在水性介质中高基化稳定菌根的结构和动态
Lela Vuković1, Fatima A Khatib, Stephanie P Drake
1Department of Chemistry, University of Illinois at Chicago, Chicago, Illinois 60607, United States.
Journal of the American Chemical Society
|July 26, 2011
概括
在水和盐溶液中,DSPEPEG2000的固体稳定小粒 (SSM) 的自我组装方式不同. 分子动力学模拟揭示了依赖溶剂的聚合数,影响细胞结构和药物递送潜力.
科学领域:
- 生物材料科学 生物材料科学
- 物理化学 物理化学
- 纳米技术纳米技术
背景情况:
- 高度PEG-化脂形成分子组件,对生物医学应用至关重要.
- 立体稳定小粒 (SSM) 是由自组装的DSPEPEG2000.形成的.
研究的目的:
- 为了研究DSPEPEG2000 SSMs的依赖溶剂的行为.
- 阐明各种解决方案中的结构差异和聚合机制.
- 探索这些细胞在分子存储和传递方面的潜力.
主要方法:
- 在纯水和HEPES缓冲盐水中对DSPEPEG2000自组装的实验研究.
- 化SSM的原子分子动力学模拟.
- 微粒大小,微粒临界度和粘度的分析.
主要成果:
- SSM 尺寸 (215 nm) 是高度依赖于溶剂和脂质度.
- 在水中,DSPEPEG2000的临界微粒度是缓冲剂中的10倍.
- 由于电荷选,聚合数显著不同 (N(agg) ≈90在盐水中与N(agg) <8在水中).
- 微细胞核可以膨胀,冠状细胞核可以波动,使各种分子的储存和输送成为可能.
结论:
- 溶剂特性极大地影响DSPEPEG2000菌根的形成和结构.
- 不同的聚合行为归因于酸盐组的差异选.
- 这些发现凸显了DSPEPEG2000小粒对于先进的生物医学应用,包括药物输送的调节性.
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